Relax requirement from VFP3 to VFP2 where possible.

src/arm/codegen-arm.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 89 matching lines @@
     MacroAssembler* masm, Label* fail) {
   // ----------- S t a t e -------------
   //  -- r0    : value
   //  -- r1    : key
   //  -- r2    : receiver
   //  -- lr    : return address
   //  -- r3    : target map, scratch for subsequent call
   //  -- r4    : scratch (elements)
   // -----------------------------------
   Label loop, entry, convert_hole, gc_required, only_change_map, done;
-  bool vfp3_supported = CpuFeatures::IsSupported(VFP3);
+  bool vfp2_supported = CpuFeatures::IsSupported(VFP2);
 
   // Check for empty arrays, which only require a map transition and no changes
   // to the backing store.
   __ ldr(r4, FieldMemOperand(r2, JSObject::kElementsOffset));
   __ CompareRoot(r4, Heap::kEmptyFixedArrayRootIndex);
   __ b(eq, &only_change_map);
 
   __ push(lr);
   __ ldr(r5, FieldMemOperand(r4, FixedArray::kLengthOffset));
   // r4: source FixedArray
@@ skipping 54 matching lines @@
   __ add(r3, r4, Operand(FixedArray::kHeaderSize - kHeapObjectTag));
   __ add(r7, r6, Operand(FixedDoubleArray::kHeaderSize));
   __ add(r6, r7, Operand(r5, LSL, 2));
   __ mov(r4, Operand(kHoleNanLower32));
   __ mov(r5, Operand(kHoleNanUpper32));
   // r3: begin of source FixedArray element fields, not tagged
   // r4: kHoleNanLower32
   // r5: kHoleNanUpper32
   // r6: end of destination FixedDoubleArray, not tagged
   // r7: begin of FixedDoubleArray element fields, not tagged
-  if (!vfp3_supported) __ Push(r1, r0);
+  if (!vfp2_supported) __ Push(r1, r0);
 
   __ b(&entry);
 
   __ bind(&only_change_map);
   __ str(r3, FieldMemOperand(r2, HeapObject::kMapOffset));
   __ RecordWriteField(r2,
                       HeapObject::kMapOffset,
                       r3,
                       r9,
                       kLRHasBeenSaved,
                       kDontSaveFPRegs,
                       OMIT_REMEMBERED_SET,
                       OMIT_SMI_CHECK);
   __ b(&done);
 
   // Call into runtime if GC is required.
   __ bind(&gc_required);
   __ pop(lr);
   __ b(fail);
 
   // Convert and copy elements.
   __ bind(&loop);
   __ ldr(r9, MemOperand(r3, 4, PostIndex));
   // r9: current element
   __ UntagAndJumpIfNotSmi(r9, r9, &convert_hole);
 
   // Normal smi, convert to double and store.
-  if (vfp3_supported) {
-    CpuFeatures::Scope scope(VFP3);
+  if (vfp2_supported) {
+    CpuFeatures::Scope scope(VFP2);
     __ vmov(s0, r9);
     __ vcvt_f64_s32(d0, s0);
     __ vstr(d0, r7, 0);
     __ add(r7, r7, Operand(8));
   } else {
     FloatingPointHelper::ConvertIntToDouble(masm,
                                             r9,
                                             FloatingPointHelper::kCoreRegisters,
                                             d0,
                                             r0,
@@ skipping 12 matching lines @@
     __ orr(r9, r9, Operand(1));
     __ CompareRoot(r9, Heap::kTheHoleValueRootIndex);
     __ Assert(eq, "object found in smi-only array");
   }
   __ Strd(r4, r5, MemOperand(r7, 8, PostIndex));
 
   __ bind(&entry);
   __ cmp(r7, r6);
   __ b(lt, &loop);
 
-  if (!vfp3_supported) __ Pop(r1, r0);
+  if (!vfp2_supported) __ Pop(r1, r0);
   __ pop(lr);
   __ bind(&done);
 }
 
 
 void ElementsTransitionGenerator::GenerateDoubleToObject(
     MacroAssembler* masm, Label* fail) {
   // ----------- S t a t e -------------
   //  -- r0    : value
   //  -- r1    : key
@@ skipping 190 matching lines @@
   // Ascii string.
   __ ldrb(result, MemOperand(string, index));
   __ bind(&done);
 }
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM